CHATTANOOGA, Tenn.--(BUSINESS WIRE)--Unum (NYSE:UNM) has appointed Marco Forato in the new role of senior vice president for global growth strategy. In addition, Steve Mitchell has been named chief financial officer for Unum’s U.S. businesses, Steve Zabel is the new president of the U.S. closed block operations, and Matt Royal has been promoted to chief risk officer for Unum Group. In his new role, Forato will work closely with Unum’s senior leadership team to identify and pursue new markets an